NodeJS Express Cache Layer

[thehabes]

No description provided.

[Copilot]

Pull Request Overview

This PR implements a comprehensive caching layer for the RERUM API v1 server, adding intelligent caching middleware for read operations and smart invalidation for write operations to improve performance and reduce database load.

Key Changes

• Added LRU cache implementation with configurable size (1000 entries) and TTL (5 minutes)
• Implemented caching middleware for all read endpoints (query, search, id, history, since, GOG endpoints)
• Implemented smart cache invalidation middleware that selectively clears relevant caches on write operations
• Added cache management endpoints (/api/cache/stats, /api/cache/clear) with comprehensive documentation

Reviewed Changes

Copilot reviewed 39 out of 39 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
cache/index.js	Core LRU cache implementation with TTL support, pattern-based invalidation, and object property matching
cache/middleware.js	Cache middleware functions for all read endpoints and smart invalidation logic for write operations
cache/tests/cache.test.js	Comprehensive unit tests (36 tests) for all cache middleware functions
cache/docs/TESTS.md	Documentation explaining test coverage, what unit tests cover vs integration tests
cache/docs/SHORT.md	Executive summary of cache benefits and performance improvements
cache/docs/DETAILED.md	Technical documentation of cache configuration, key formats, and invalidation patterns
cache/docs/ARCHITECTURE.md	System architecture diagrams showing request flows and cache structure
routes/*.js	Integration of cache middleware into all relevant route handlers
routes/api-routes.js	Added cache management endpoint routes
controllers/*.js	Removed AI attribution from author tags
controllers/delete.js	Added res.locals.deletedObject for smart cache invalidation

[Copilot]

The date 'October 20, 2025' is in the future. Based on the system date context (currently October 2025), this should likely be a current date in October 2025, but the specific day (20th) may be incorrect or placeholder text.

Suggested change

	**Last Updated**: October 20, 2025
	**Last Updated**: October 2025